Trying to decide on vol 2 for the future. Mining stocks have a higher upside than the metals themselves, but you also have issues like their location being in unfavorable territory where some type of 3rd world government can just come in and shut them down, kick them out, stop them from mining, whatever. You also have to figure out if all their costs and reserve estimates are legit. There's a lot of due diligence involved.
The information also goes stale faster. If I say some mining company is good now, it might not be a day or two later when someone actually reads this from price changes. There is also another argument, which I'm not sure if I buy or not, that people who make megabucks off mining stocks in an economic crash will have the government come in and take most of it in a windfall tax. Most people who are heavy into mining stocks also own lots of the metal themselves in their house, so that should tell you something.